| http://www.w3.org/ns/prov#value | - R1, R2, R3, R4, and R5 are members independently selected from H, OH, a water-soluble polymer and linker-water-soluble polymer, with the proviso that at least one of R1, R2, R3, R4, and R5 is a member selected from said water-soluble polymer and said linker-water-soluble polymer;
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